[Asterisk-java-users] No such channel?

[<vaz...@zh...>]

I'm trying to make my Asterisk PBX callback two (external) numbers  
and connect them together as one call. That means: PBX calls the  
caller and then the callee, after that the caller can talk to the  
callee and vice-versa.

To do that, I use Asterisk-Java to steer the PBX over the AGI (or at  
least I think that I'm doing that ;-)). A http-packet containing  
caller- and callee-number is sent to the webserver which sets them as  
parameters for my java-application. There I use the Asterisk-Java- 
Function originateToExtension from the AsteriskServer Interface to  
get the PBX do what I want (here's the Javadoc to that Interface  
where you'll also find the function):

http://asterisk-java.org/0.3-SNAPSHOT/apidocs/org/asteriskjava/live/ 
AsteriskServer.html

I'm running a default Trixbox-Installation with a VoIP-Uplink to my  
Provider (CityTel) which works with in- and outbound calls (tested  
with SIP-Phone).

I'm using the following parameters for the function mentioned above:

channel: SIP/CityTel/<caller-number>
context: CityTel
exten: <callee-number>
priority: 1
timeout: 30000

Now, I tried it with different configs and allways get the following  
error:

Couldn't find channel: org.asteriskjava.live.NoSuchChannelException:  
Channel 'SIP/CityTel/<caller-number>' is not available.

Does that mean, that this doesn't work with two EXTERNAL numbers or  
is there another problem I don't see? Probably more an AGI then an  
Asterisk-Java-Question...

Thanks a lot for your help!

Saludos
Javier